Newspaper readers pictured a narrow, shooting band, like the track of a searchlight, flashing from England and wagging over Canada until it found its mark. That was essentially the right picture, except that where a searchlight beam starts out intensely bright and soon dwindles palely, the beam in question remained almost as powerful 3,000 miles from its starting point; and except that it was, of course, an invisible beam, a shaft of radio waves.
The picture was conjured by an announcement in Britain that the royal and...
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